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3 years ago

Type in the number that should go in the blank. Use a slash (/) to show a fraction.

Mathematics

1 answer:

Inessa [10]3 years ago

8 0

Answer:

32 people people came in blue cars.

6 people came in red cars.

Step-by-step explanation:

Here, the given total number of people in the group = 48

Number of people who came in blue cars = Two - thirds

Now, Two - thirds of 48 = $\frac{2}{3} \times 48 = 32$

So, total 32 people out of total 48 people came in blue cars.

Number of people who came in red cars = One- eighth

Now, One- eighth of 48 = $\frac{1}{8} \times 48 = 6$

So, total 6 people out of total 48 people came in red cars.

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Look at number 17. What did I do wrong?

Gnesinka [82]

When you are checking your answers, your formula should read out as 9(2.222) - 8 = 12, which is simply filing in the x value that you calculated (it comes out to 11.998 which is correct). You wrote it out as 9(2.22) - 8 = -6, which is why your checking process was incorrect

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2 years ago

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What is f(5)? I have 20 min left

jolli1 [7]

To find f(5), just look at the table and find the value for x that corresponds with f(5). In this case, this value is -1.

So, your answer is B. -1.

Hope this helps!

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2 years ago

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A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measurin

Ratling [72]

Answer:

The standard deviation of weight for this species of cockroaches is 4.62.

Step-by-step explanation:

Given : A different species of cockroach has weights that are approximately Normally distributed with a mean of 50 grams. After measuring the weights of many of these cockroaches, a lab assistant reports that 14% of the cockroaches weigh more than 55 grams.

To find : What is the approximate standard deviation of weight for this species of cockroaches?

Solution :

We have given,

Mean $\mu=50$

The sample mean x=55

A lab assistant reports that 14% of the cockroaches weigh more than 55 grams.

i.e. P(X>55)=14%=0.14

The total probability needs to sum up to 1,

$P(X\leq 55)=1-P(X>55)$

$P(X\leq 55)=1-0.14$

$P(X\leq 55)=0.86$

The z-score value of 0.86 using z-score table is z=1.08.

Applying z-score formula,

$z=\frac{x-\mu}{\sigma}$

Where, $\sigma$ is standard deviation

Substitute the values,

$z=\frac{x-\mu}{\sigma}$

$1.08=\frac{55-50}{\sigma}$

$1.08=\frac{5}{\sigma}$

$\sigma=\frac{5}{1.08}$

$\sigma=4.62$

The standard deviation of weight for this species of cockroaches is 4.62.

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2 years ago

Please help i don’t know the middle one

Gnom [1K]

Answer:

Step-by-step explanation:

A new study suggests that waiting at least an hour after dinner before going to sleep reduces your risk of stroke by about two-thirds.

And for every 20 minutes more that you wait, stroke risk drops another 10%, says researcher Cristina-Maria Kastorini, MSc, a nutritionist at the University of Ioannina Medical School in Greece.

The study does not prove cause and effect -- only that there seems to be an association between waiting an hour or more between dinner and bedtime and reduced stroke risk.

Results of the 1,000-patient study were presented here at the European Society of Cardiology Congress 2011.

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2 years ago

120 110 A pick-your-own blueberry farm offers 6 pounds of blueberries for $14. Cost (dollars) 100 90 Drag the points to create a

shutvik [7]

The relationship between cost and pounds of blueberries is y = (7/3)x

A linear equation is of the form:

y = mx + b

where y, x are variables, m is the slope of the line and b is the y intercept.

Let y represent the cost in dollars for x pounds of blueberries.

Since 6 pounds of blueberries cost $14, hence:

m = $14/ 6 pound = $7/3 per pound

Therefore the relationship between cost and pounds of blueberries is y = (7/3)x

Find out more at: brainly.com/question/25445678

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2 years ago